Cissus cactiformis is similar to Cissus quadrangularis (a smaller plant) and often put in synonymy under this species, however the two are quite distinct in the field, but it seems possible that spontaneous hybrids can be encountered in S Africa. This two species are very interesting and especially so in view of the resemblance to a species of succulent geranium, Pelargonium tetragonum.
Ursula said: .. ...